diff options
| author | Sudeep Holla <sudeep.holla@arm.com> | 2017-06-06 11:32:24 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2018-02-28 16:37:57 +0000 |
| commit | 76a6550990e296a7acbb4d33201c9740be912a8c (patch) | |
| tree | 76774fc28a4ed2f5fd02dc86f0c7d3873225b479 /include/linux/scmi_protocol.h | |
| parent | 5f6c6430e904d21bfe5d0076b1ff3e8b9ed94ba0 (diff) | |
firmware: arm_scmi: add initial support for power protocol
The power protocol is intended for management of power states of various
power domains. The power domain management protocol provides commands to
describe the protocol version, discover the implementation specific
attributes, set and get the power state of a domain.
This patch adds support for the above mention features of the protocol.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
--
drivers/firmware/arm_scmi/Makefile | 2 +-
drivers/firmware/arm_scmi/power.c | 242 +++++++++++++++++++++++++++++++++++++
include/linux/scmi_protocol.h | 28 +++++
3 files changed, 271 insertions(+), 1 deletion(-)
create mode 100644 drivers/firmware/arm_scmi/power.c
Diffstat (limited to 'include/linux/scmi_protocol.h')
| -rw-r--r-- | include/linux/scmi_protocol.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 5a3092f05011..8cd0348787bc 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -113,10 +113,36 @@ struct scmi_perf_ops { }; /** + * struct scmi_power_ops - represents the various operations provided + * by SCMI Power Protocol + * + * @num_domains_get: get the count of power domains provided by SCMI + * @name_get: gets the name of a power domain + * @state_set: sets the power state of a power domain + * @state_get: gets the power state of a power domain + */ +struct scmi_power_ops { + int (*num_domains_get)(const struct scmi_handle *handle); + char *(*name_get)(const struct scmi_handle *handle, u32 domain); +#define SCMI_POWER_STATE_TYPE_SHIFT 30 +#define SCMI_POWER_STATE_ID_MASK (BIT(28) - 1) +#define SCMI_POWER_STATE_PARAM(type, id) \ + ((((type) & BIT(0)) << SCMI_POWER_STATE_TYPE_SHIFT) | \ + ((id) & SCMI_POWER_STATE_ID_MASK)) +#define SCMI_POWER_STATE_GENERIC_ON SCMI_POWER_STATE_PARAM(0, 0) +#define SCMI_POWER_STATE_GENERIC_OFF SCMI_POWER_STATE_PARAM(1, 0) + int (*state_set)(const struct scmi_handle *handle, u32 domain, + u32 state); + int (*state_get)(const struct scmi_handle *handle, u32 domain, + u32 *state); +}; + +/** * struct scmi_handle - Handle returned to ARM SCMI clients for usage. * * @dev: pointer to the SCMI device * @version: pointer to the structure containing SCMI version information + * @power_ops: pointer to set of power protocol operations * @perf_ops: pointer to set of performance protocol operations * @clk_ops: pointer to set of clock protocol operations */ @@ -125,9 +151,11 @@ struct scmi_handle { struct scmi_revision_info *version; struct scmi_perf_ops *perf_ops; struct scmi_clk_ops *clk_ops; + struct scmi_power_ops *power_ops; /* for protocol internal use */ void *perf_priv; void *clk_priv; + void *power_priv; }; enum scmi_std_protocol { |